Rotary oven and drier.



. A. JOHNSON. ROTARY OVEN AN D DRIER.

APPLICATION FILED APR. 23, I918 Patented Apr. 1, 1919.

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ROTARY OVEN AND DRIER.

APPLICATION FILED APR.23,1918.

Patented Apr. 1, 1919.

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.nnrrrm STATES PATENT OFFICE. X

ADOLPH aonivson, or BATTLE CREEK, MICHIGAN.

- RorAaY ovnn'nminnrnn.

To all whom it may concern:

Be it known that I, 'ADOLPH JOHNSON, citizen of the United States, residing at Battle Creek, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Rotary Ovens and Driers, of which the following structed the casing and the revoluble oven or cylinder are of considerable length as compared with the diameter of the cylinder.

For its object this invention contemplates the production of a rotary oven and drier falling within the type mentioned, whereof certain parts are of special construction and arrangement one. with respect to another, and by which it is believed a saving of heat 1s elfected and convenience and completeness of operation and of the desired result are increased. i

The particular formation and disposition of the various. partsconstituting this invention are illustrated in the accompanying drawings, whereof Figure 1 represents a side view of allt'he parts assembled. In this view a portion of the casing and revoluble oven are broken away to shorten the view, and certain parts are shown in sectlon, the

walls of the casing and cylinder being broken away near the ends to disclose the parts located interiorly. Fig. 2 is an end view showing the right hand end of the whole structure as illustrated in Fig. 1. Fig. 3 is an end View of the left hand end of the structure as illustrated in Fig. 1.

Throughout the description and drawings, the same letter is used to refer to the same part.

Considering the drawings, the outer casing A is provided with draft dampers a in any desired number located near the bottom of the casing, and with side doors B by way of which the heating burners b, for gas, may be reached or observed. There may be any number of chimneys C, provided with dampers 0, and the distance between the I Specification of Letters I Patent 5 Patented Apr.'2l ,1919.

Application filed Ap ri1 23,191'8. Serial a a.

chimneys may 'vary as set forth. It is not intended; to restrict this. invention to the number, ofgas burners, or othersources of heat, or to the precise fo'rms' of. the ordinary details' shown such as the dampers and doors. 1

Within the casing A at the left'and below the end'of-the revolving oven, there is arranged a receiving hopper D for the cooked materiahand'the hopper has aspout (Z which passes in a downwardly inclined direction outwardly'through the left hand end of the casing.

On the exterior of theright hand end of the casingA is secured a shelf 1t, and upon I theshelfare sets of suitably supported rollers} c, -which*will be again "mentioned. In any manner, the right handend of the outer casing is provided with a door F, by which entrance may be effected into the casing. On the left hand end of the casing is placed a shelf G, similar to the shelf E, andlupon the shelf G are located the rollers g.

' Considering Figs. 1 and 2, it will be noted that on the right hand end'of the casing is attached a. horiz'ontalyoke or bridgepi'ec'e Hfand a' ho'pper h is supported'by the yoke. The hopper it has a' spout 7p, and near the hopper the spout h carries a circular plate orfhe'at barrier J, in practice usually comprising two sheets of metal spaced apartas illustrated. the lower end of the spout h is'another similar heat guard or barrier j, which may be of larger diameter than the first mentioned. The circular barrier J fits movably within the outer end of a hollow, cylindrical gudgeon K secured to the right hand end of the oven cylinder is, and supported by the rollers 6 already referred to. Within the oven cylinder and mounted upon the wall thereof is a spiral vane L extending substantially from end to end of the cylinder. Near the left hand end of the oven cylinder are a number of separated openings M by which the contents of the cylinder may be discharged into the hopper D. To reach the openings M to keep them free from clogging, a door m is provided in the wall of the casing A as illustrated in Fig. 1. It will be observed that, as illustrated in Fig. 1, the heat barrier plates j and n. closing the inner mouths of the trunnions K and N, have very nearly the diameter of the interior of the oven cylinder. The reason for this construction is to enable the plates j and n,

holding theheated'" air in the cylinderkgto prevent the flying, tumbling particles of the material treated fromentering the-- hol.low-= trunnions where they do not belong andit.

is not desired that they should'be deposited. On the left, there is connected with the cylindrical! oven J and arranged centrally on the head thereof, the gudgggeonor,tnunig gon,,- l T 1v This gudgeon is closed interiorly by a double p er hea barrier! nhejg dgeeneNheea circumferential ridge- Ol.that,,engagesicorree poudingigroove e n herollereg w ch! 1 en pp t he g idgeon The; ge. nd

grooves, providedyon ,the gudgeon, and in; the rollers, are to prevent the movement o.;f;the venylinderl ng wi e e t eaml es; the trunnion No is mounted-thegear 1?, that I I meshes with,'a,r-p n on. Q onv horizontal haftv R v The. shaft nd, he olle s ,gwh ve the: ommQmbear nge 1%,. th haft, & r ven by. heip lleysl, S, v nl-the rdin ry manner.

Inthe explanation: of theIILQdQ of oplera- I tion of this, invention, it- Jnay, be. stated that tea,considerable money value.

Havin now, described; thisinvention, and explaine r he-m deof i s op r on, What I l imiswi I 1.,In a,rotarytoven and drier,,the,cornbi+ nation 'with' an oven cylinder, of hollow trunnions arranged vat the ends of the cylinder, roll'ers arranged-to support the trunnions a, hopper having a spout extending through one of the said trunnions in a diagonally downward direction, a circular heat -'ba-rri'erplate located within the outer-end ot' the trnnnion whereby the end of the trunnion is closed andthe trunnion may revolve around the edge-of said plate, 5 located eyondrt z nd-a f, e un io 0i l PP'Q revolving trunnion. r 2. In,a,rotary1, oven-and drier the combiend of, the

na on: ith n en y ind r-1, Of b l trnnnions arranged, at. the ends of; the., cyl-, nder, r l1er -wranee to upp rt h t un-i nionst. w: opp r ha g-1 e; p xt ndi g hroughlher runni n at ne i he 1 yl: inder in a diagonal-downward direction, a circular I heat, barrierplatelocated in. the outer end, of. the.trunni on whereb theend of; the trunnion is closed and; the trunnion may, revolve aroundg the. edge of theplate, means. located beyond the end of, the; trun: nion' for supporting, the, said hopper and plate, a. heat barrier plate; attached to and supported by, thesaid spout near'the lower end thereof and; p ojecti g 1 adially ey n thesides of the, trunnionin the-saidpven cylinder to -close the inner end, oftherevolving trunnion, the saidr cylinder having; dis-. charge openings near the second trunnion, and a; heat: barrier, plate, arranged to close the inner mouth of the said second trunnion adj acent; to the said openings.

Iii/testimony whereof I1 afliX my; signature ADOEPH; JQHNSON.

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